On May 11, "Full independence, full process, full coverage" 2023 Real-Scene 3D New Technology Symposium Shijiazhuang Station and Aerial Survey and Remote Sensing Academic Exchange Conference was successfully held at Kaixuan Jinyue Hotel in Shijiazhuang.
The meeting was guided by the Chinese Society of Surveying and Mapping and the China Geographic Information Industry Association, hosted by the Hebei Provincial Society of Surveying and Mapping and the Hebei Provincial Geographic Information Industry Association, and undertaken by Wuhan Dashi Smart Technology Co., Ltd. and the Aerial Photogrammetry and Remote Sensing Professional Committee of the Hebei Provincial Society of Surveying and Mapping. More than 300 leaders, experts, scholars, entrepreneurs and technical elites from the field of surveying, mapping and geographic information were invited to participate in the meeting to exchange the development status and application prospects of real-world 3D new technologies. Li Xinfa, President and Secretary of the Party Committee of the Third Institute of Surveying and Mapping of Hebei Province presided over the meeting.
Zhang Fan, CTO of Wuhan Dashi Smart Technology Co., Ltd.; Han Zhendong, General Manager of the Equipment Product Department of Wuhan Dashi Smart Technology Co., Ltd.; Xu Liang, General Manager of the Future Map Division of Wuhan Dashi Smart Technology Co., Ltd.; Hu Zhenbiao, System Architecture Director of Qingdao Institute of Surveying and Mapping; Resource Remote Sensing Technology and Application Hebei Provincial Engineering Research Center (preparation), Professor Chen Yongli, Hebei First Institute of Surveying and Mapping; Wang Qi, director of Langfang Cultural Landscape Digital Protection Technology Research and Development Center, made wonderful speeches respectively.
Xu Tieshu, President of Hebei Geographic Information Industry Association, delivered a speech for this seminar. The continued chairman said that my country's geographic information industry has grown into a new growth point of the national digital economy and is one of the core industries of the national digital economy construction. It is necessary to continuously promote the localization and innovation of geographic information technology. Wuhan Dashi Wisdom Technology Co., Ltd. has brought a series of real-time, fast, efficient and localized technical equipment and solutions to the industry with its own leading real-scene 3D modeling technology and experience , and promoted the construction and development of the national geographic information industry. Innovation in geographic information technology.
Algorithm optimization supports rapid modeling of satellite images
Dashizhizhi CTO Dr. Zhang Fan appeared at the meeting as the first sharing guest. He pointed out that in recent years, high-resolution satellites have achieved rapid development, and the use of high-resolution satellite images to carry out refined 3D modeling is more in line with the current needs of large-scale real-world 3D modeling and rapid construction of urban 3D models. However, in the actual reconstruction process, there are many technical difficulties in the satellite image reconstruction process, such as epipolar line correction, dense matching, and DSM merging .
For this reason, Dashizhi Technology's technical team has overcome difficulties in aerial triangulation and matching algorithms, and launched the Reconstruction Master Satellite Edition . This product not only doubles the improvement in modeling efficiency and quality, but also realizes high-resolution optical stereo satellite data, multi-track high-resolution satellite data, color laser point cloud data, and downward-looking aerial photography through stereo matching technology. Fast reconstruction of multi-source data such as data . It is worth mentioning that the satellite imagery 3D reconstruction technology of Reconstruction Master Satellite Edition has been able to completely replace foreign satellite processing software , ensuring the safety of the data production process to a certain extent .
At the seminar, everyone spoke highly of the performance of Reconstruction Master Satellite Edition, and said that the launch of this technology is an important step in the development of real-world 3D technology to a higher level.
Reborn to meet the needs of all-scenario operations
From the perspective of application, Han Zhendong, general manager of Dashizhi's equipment product department, shared the localized and professional technologies and solutions provided by Dashizhi's real-world 3D data product system.
Among them, Reconstruction Farm 2.0, a real-world 3D data center solution with super computing power, has attracted much attention. Relying on the powerful algorithm support of Reconstruction Master 6.0, Reconstruction Farm 2.0 ushered in a completely new upgrade. Within the physical space of less than 0.8 square meters, the number of reconstructed photos has been upgraded from the original "30,000 per day" to "70,000 per day " . Comprehensive modeling efficiency increased by 2.3 times .
The product has a built-in software system of reconstruction master 6.0, scheduling master 3.0, model cube 4.0, DasViewer3.0, and grid master 1.0, which is fully independent and full-process, to meet the needs of real-world 3D full-process operations. Provide 10 data engineers with standard-configured terminals to perform various data processing operations. After the engineers leave work, the built-in scheduling master 3.0 operation and maintenance software will automatically start the reconstruction master 6.0 intelligent operation engine to allocate computing resources in an all-round way . Automatic and fast 3D modeling greatly improves modeling efficiency.
During the meeting, the operation mode of Reconstruction Farm 2.0 "working machine during the day and computing power machine at night" attracted the attention of many participants, and they all stopped for on-site trial consultation.
Xu Liang, general manager of the future map business department of Dashizhi, vividly demonstrated the real-scene 3D natural resource data base of the whole scene, the whole space and all elements created by Dashizhi in the construction of digital China , involving natural resource supervision and management, smart city construction and many other application scenarios.
Technology Empowerment Helps Urban Construction and Cultural Protection
As the special guests of this seminar, Hu Zhenbiao, director of system architecture of Qingdao Institute of Surveying and Mapping; Chen Yongli, professor-level senior engineer of Hebei Engineering Research Center of Land and Resources Remote Sensing Technology and Application (preparation), Hebei First Institute of Surveying and Mapping; Hebei Province Wu Jianfei, director and senior engineer of the Aerospace Remote Sensing Office of the Third Institute of Surveying and Mapping; Wang Qi, a senior engineer of Hebei Provincial Institute of Geological Surveying and Mapping and director of Langfang Cultural Landscape Digital Protection Technology Research and Development Center, also made wonderful sharing.
Director Hu Zhenbiao shared the application and construction projects of real-scene 3D technology in Qingdao's urban construction, cultural tourism promotion, smart management, investment attraction and other scenarios. He said that the real 3D Qingdao, as the city’s unified and authoritative space-time information base, fully supports the digital Qingdao and the information application of various departments . The space is leapfrogged and upgraded , and the overall scale, technical indicators and types of achievements are all at the domestic leading level.
Director Hu pointed out at the meeting that Dashi Wisdom has provided strong technical support for Qingdao Institute of Surveying and Mapping. Taking the reconstruction of a farm as an example, it occupies a small area, has strong computing power, and is easy to maintain . In particular, this method supports the multi-opening mode of one machine, which greatly improves resource utilization and real-scene 3D modeling efficiency for the real-scene 3D Qingdao construction project .
After several rounds of technical research, Qingdao Research Institute of Surveying and Mapping has applied for and been approved for 5 invention patents in terms of real-world 3D modeling, fusion, and application, among which 2 invention patents were jointly participated by Dashi Smart .
Mr. Chen Yongli introduced the real-world 3D construction achievements of Hebei Province, such as the fusion of 0.5-meter resolution DOM and 5-meter grid spacing DEM to construct 0.5-meter-resolution Mesh 3D models, and proposed that "real-world 3D data not only need High precision and high resolution also require richer semantic information , and city DEM can only meet the requirements of precise analysis if it contains rich semantic information.”
Director Wu Jianfei discussed with you the situation of terrain-level real-scene 3D production and construction and the feasibility of promotion of satellite image real-scene 3D. He believes that the effect and accuracy of the current terrain-level real-scene 3D model are much higher than the 2.5-dimensional results generated by DOM superimposed on DEM. The production technology of real-scene 3D results from satellite images and aerial oblique photography data enriches the production mode of terrain-level real-scene 3D models and can guarantee the output of model products. Therefore, the time is ripe for the promotion and construction of terrain-level real-scene 3D models as a new basic geographic information data.
Director Wang Qi gave a keynote report on the theme of "Application of Aerial Survey Technology in the Digital Protection of Cultural Landscape". He pointed out that through UAV photogrammetry and 3D modeling, a scene-based, refined and integrated linear culture can be established. The heritage protection platform plays an important role in the archives construction, heritage restoration, virtual restoration, and exhibition display of linear cultural heritage .
The symposium ended successfully with warm applause, which successfully promoted the multi-party communication and integration in the field of real 3D, and played a positive role in promoting the national geographic information industry and the construction of real 3D China. As a participant, pioneer, and promoter of real-scene 3D construction in China, Dashizhizhi is committed to realizing the landing of more real-scene 3D application scenarios.
On May 19, we will unlock the next stop - Shenyang.
Looking forward to working with leaders, partners, and friends in more fields to discuss new directions, new trends, and new technologies in real-scene 3D, to contribute to the construction of digital China, and to jointly build the space-time foundation of the future world!
